As Java has such a huge existing ecosystem it will be hard for a language like Kotlin to suddenly rise and take over in such a short amount of time. It is everywhere as Sun/Oracle always claim.

To get started with Kotlin, download the Android Studio 3.0 preview, open one of your existing Java files, and then choose “Convert Java File to Kotlin File” in the Code menu.

Google's Android Studio 3.0 dev environment has just become available in the stable channel, with built-in support for Kotlin and Java 8.

Kotlin may even change how Java is used on the server, too." "In short, Android developers without Kotlin skills are at risk of being seen as dinosaurs very soon," Realm experts add.

February 15, 2016 - 8:14 pm Jetbrains, the team behind the popular Java IDE IntelliJ, have released Kotlin 1.0, its homegrown programming language for JVM and Java.